<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script>

        function test() {
//            this
        }
        test();


        var o = {
			name: "叶鑫",
			sayHello: function () {
				this.sayHi();
			},
			sayHi: function () {
				console.log("Hello我是" + this.name);
			}
		}
        console.log(name);

        o.sayHello();
    </script>
</head>
<body>

</body>
</html>